79011640 has 64 divisors (see below), whose sum is σ = 184757760. Its totient is φ = 30387840.

The previous prime is 79011589. The next prime is 79011643. The reversal of 79011640 is 4611097.

It is a junction number, because it is equal to n+sod(n) for n = 79011599 and 79011608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79011643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121797 + ... + 122443.

It is an arithmetic number, because the mean of its divisors is an integer number (2886840).

Almost surely, 2^79011640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79011640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92378880).

79011640 is an abundant number, since it is smaller than the sum of its proper divisors (105746120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79011640 is a wasteful number, since it uses less digits than its factorization.

79011640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 79011640 is about 8888.8491943558. The cubic root of 79011640 is about 429.1051156688.

The spelling of 79011640 in words is "seventy-nine million, eleven thousand, six hundred forty".